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For the Inventor, By the Inventor

Koganei, Japan

Masafumi Mochizuki

This inventor holds 66 USPTO granted patents, primarily in Magnetic Recording Technology (CPC class G11B). Top assignees: Hitachi Global Storage Technologies Netherlands B.v., Hgst Netherlands, B.v., Hitachi, Ltd.. Active years: 2003-2016.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masafumi Mochizuki. Retrieved from https://idiyas.com/inventor/masafumi-mochizuki

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 66

% Patents Active = 30.3

Average Co-Inventor Count = 3.4

ph-index = 14

Forward Citations = 702(Granted Patents)

Forward Citations (Not Self Cited) = 663(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Kokubunji, JP (2003 - 2009)
  • Koganei, JP (2006 - 2011)
  • Tokyo, JP (2008 - 2012)
  • Kanagawa, JP (2011 - 2014)
  • Kanagawa-ken, JP (2011 - 2014)
  • Chigasaki, JP (2013 - 2016)

Company Filing History:

goldMedal27 out of 2,636 
 
Hitachi Global Storage Technologies Netherlands B.v.
 patents
silverMedal15 out of 987 
 
Hgst Netherlands, B.v.
 patents
bronzeMedal12 out of 42,740 
 
Hitachi, Ltd.
 patents
4. 10 out of 227 
 
Hitachi Global Storage Technologies Japan, Ltd.
 patents
5. 2 out of 52 
 
Hitachi Global Storage Technologies
 patents

Years Active: 2003-2016

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Areas of Expertise:
Microwave-Assisted Recording
Magnetic Head
Shingled Magnetic Recording
Perpendicular Recording
Magnetic Disk Drive
Dual Magnetic Sensor
Track Pitch Variation
Carbon Nano-Tube
Thermal Expansion Shield
Electromagnetic Field Generation
Thin Film Technology
Data Recording Methods
66 patents (USPTO):Explore Patents
1. 9305586 - Microwave-assisted magnetic recording device and method of formation thereof (2016-04-05),
2. 9099127 - Dual magnetic sensor for multi-input magnetic recording (2015-08-04),
3. 8976484 - Magnetic recording with tilted media in the cross track direction (2015-03-10),
4. 8861116 - Track pitch variation measurement method using spiral DC pattern writing (2014-10-14),
5. 8830635 - Magnetic head having shield layer(s) with low coefficient of thermal expansion and magnetic storage apparatus having same (2014-09-09),
6. 8817406 - Magnetic-recording head with touch-down detector incorporating a carbon nano-tube (2014-08-26),
7. 8792210 - Asymmetric writer for shingled magnetic recording (2014-07-29),
8. 8786984 - Perpendicular magnetic write head having a current carrying element for in-plane field assisted magnetic recording (2014-07-22),
9. 8760801 - Magnetic head having a planar hall effect read sensor (2014-06-24),
10. 8717708 - Magnetic head and magnetic disk apparatus (2014-05-06),
11. 8634163 - Dual reverse microwave assisted magnetic recording (MAMR) and systems thereof (2014-01-21),
12. 8630064 - Magnetic write head with novel shield structure having latterally extending trailing gap layer and concaved side gap (2014-01-14),
13. 8472139 - Shingled magnetic recording (SMR) head with bent trailing shield and methods of production thereof (2013-06-25),
14. 8411384 - Writer having a shield structure for adjacent and far track interference refreshment (2013-04-02),
15. 8373940 - Magnetic head having a facing electrode pair for generating an electromagnetic field and applying energy to the magnetic recording layer (2013-02-12),

Title: The Innovative Journey of Masafumi Mochizuki

Introduction: Masafumi Mochizuki, a talented inventor hailing from Koganei, Japan, has made significant contributions to the field of innovation with his groundbreaking ideas and inventions.

Latest Patents: Masafumi Mochizuki holds several patents in various technological domains, showcasing his versatility and creativity in inventing new solutions to complex problems.

Career Highlights: Throughout his illustrious career, Masafumi Mochizuki has demonstrated a keen eye for identifying gaps in the market and developing innovative products to address them. His dedication to pushing the boundaries of technology has earned him recognition as a pioneer in the industry.

Collaborations: Masafumi Mochizuki has collaborated with leading research institutions, universities, and companies to further his research and bring his inventions to life. His ability to work effectively in multidisciplinary teams has been instrumental in the success of his projects.

Conclusion: Masafumi Mochizuki's passion for innovation and his relentless pursuit of excellence have established him as a prominent figure in the world of inventors. His contributions have not only transformed industries but have also inspired the next generation of innovators to dream big and think outside the box.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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